/Engine/Source/Developer/AssetTools/Public/IAssetTools.h
Returns list of objects that soft reference the given soft object path. This will load assets into memory to verify
void FindSoftReferencesToObject ( [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) TargetObject, [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & ReferencingObjects )